US 12,432,490 B2
Dual compression driver with annular exit
Alexander Voishvillo, Simi Valley, CA (US)
Assigned to Harman Professional, Inc., Northridge (CA)
Filed by Harman Professional, Inc., Northridge, CA (US)
Filed on Dec. 20, 2023, as Appl. No. 18/390,730.
Prior Publication US 2025/0211897 A1, Jun. 26, 2025
Int. Cl. H04R 1/34 (2006.01); H04R 1/02 (2006.01); H04R 1/24 (2006.01); H04R 7/12 (2006.01)
CPC H04R 1/345 (2013.01) [H04R 1/025 (2013.01); H04R 1/24 (2013.01); H04R 7/12 (2013.01); H04R 2201/34 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A dual compression driver, comprising:
a first driver assembly including a first motor assembly disposed about a central axis at a first end of the dual compression driver, a first annular diaphragm disposed coaxially above and operably connected to the first motor assembly, and a first phasing plug disposed coaxially above the first annular diaphragm, the first phasing plug including an input side oriented toward the first annular diaphragm and an output side oriented away from the first annular diaphragm, the first phasing plug including a first plurality of apertures extending therethrough;
a second driver assembly including a second motor assembly disposed about the central axis at a second end of the dual compression driver, a second annular diaphragm disposed coaxially below and operably connected to the second motor assembly, and a second phasing plug disposed coaxially below the second annular diaphragm, the second phasing plug including an input side oriented toward the second annular diaphragm and an output side oriented away from the second annular diaphragm, the second phasing plug including a second plurality of apertures extending therethrough; and
a hollow extension duct having a bottom end mounted to the first phasing plug and a top end extending toward the second end of the dual compression driver, wherein an inner surface of the extension duct and an outer surface of the second driver assembly form an annular pathway terminating at an annular exit at the second end of the dual compression driver, wherein acoustic signals from the first plurality of apertures merge with acoustic signals from the second plurality of apertures between the output side of the first phasing plug and the output side of the second phasing plug and radiate radially outward to the annular pathway and through the annular exit.